Question

In Groovy, there is a nice syntax for working with null values.

For example, I can do an if statement:

if (obj1?.obj2?.value) {

}

This will not throw a NullPointerException even if obj1 is null (it will evaluate to false).

This is something that’s very convenient, so wondering if there is a Ruby equivalent I missed.

Answer 1

In a rails app there is Object#try

So you can do

obj1.try(:obj2).try(:value)

or with a block (as said on comments bellow)

obj.try {|obj| obj.value}

UPDATE

In ruby 2.3 there is operator for this:

obj&.value&.foo

Which is the same as obj && obj.value && obj.value.foo